# Eye Handbook vs Clock Buster

The clearest difference is ads: Clock Buster at none against Eye Handbook's shown. Clock Buster also leads on rating (5.0 vs 4.8) and monetization model (free vs ad-supported). Eye Handbook's advantage is ratings volume (1.2K vs 6). On price, in-app purchases, device support and iOS requirement there is nothing between them.

Both are free to download. Neither carries in-app purchases, so what you see is what you pay.

Clock Buster holds the better App Store score, 5.0 against 4.8. That said, the two scores are not equally well evidenced: Eye Handbook has 1.2K ratings behind it against 6, so its average is the more settled of the two.

Eye Handbook ships an update every 3 weeks, Clock Buster every 9 days. The most recent releases landed on October 15, 2026 and October 3, 2026 respectively.

## The numbers

| Metric | Eye Handbook | Clock Buster |
| --- | --- | --- |
| Price | Free | Free |
| Rating | [4.8 (1.2K ratings)](https://appshunter.io/ios/app/eye-handbook/id335546959/reviews) | **[5.0 (6 ratings)](https://appshunter.io/ios/app/clock-buster/id6797585802/reviews)** |
| Number of ratings | **1.2K** | 6 |
| Positive reviews | 81.1% of reviews | — |
| In-app purchases | No | No |
| Ads | Yes | **No** |
| Update frequency | Every 3 weeks | **Every 9 days** |
| Monetization | Ad-supported | **Free** |
| Size | 480 MB | 45 MB |
| Requires iOS | 16.0 | **15.1** |
| Devices | iPhone, iPad | iPhone, iPod |
| Age rating | 17+ | 17+ |
| Developer | [Cloud Nine Development LLC](https://appshunter.io/developer/335546962) | [Jessica Azevedo Horty](https://appshunter.io/developer/6797586311) |

## What reviewers say

### Eye Handbook

[App page](https://appshunter.io/ios/app/eye-handbook/id335546959)

A comprehensive eye care reference app for ophthalmologists, optometrists, and students. It offers diagnostic tools, treatment references, calculators, educational resources, and community forums to support eye care professionals.

**Highlights:** Diagnostic and treatment reference, Eye calculators (visual acuity, diabetic retinopathy, etc.), Medication and pharmacopeia, Ophthalmology and optometry journals, Patient education tools, Peer-to-peer forums, Eye atlas and diagrams

**Features:** macOS Compatibility, Vision Pro support

**In-app purchases:** none

**What reviewers like**

- 👍 Useful information and tools
- 🚀 Comprehensive and efficient
- 💡 Great resource for eye care professionals
- 😊 Excellent app overall

**What reviewers complain about**

- 🐛 Crashes and bugs
- 📢 Intrusive ads and pop-ups
- 🔍 Poorly organized interface
- 🔋 High battery consumption

**Reported bugs**

- Registration process issues
- Compatibility problems with newer iOS versions
- Incorrect medication information

**Requested features**

- Add Tumbling E and Landolt C charts
- Improve search functionality
- Provide a paid ad-free version
- Optimize for larger screens (iPad)


### Clock Buster

[App page](https://appshunter.io/ios/app/clock-buster/id6797585802)

This real-time timer streamlines stroke care workflows in emergency settings. It helps medical professionals track critical intervals, calculate stroke scale metrics, and determine medication dosages. Secure live sharing keeps multidisciplinary teams synchronized for faster treatment.

**Highlights:** Real-time stroke code timing, Optimize acute ischemic stroke workflows, Minimize door-to-needle times, Track critical clinical intervals, Calculate real-time NIHSS stroke scale, Compute TNK dosing, Secure live sharing for teams

**Features:** macOS Compatibility, Vision Pro support

**In-app purchases:** none


## Frequently asked questions

### Is Eye Handbook free?

Eye Handbook is free to download, with no in-app purchases.

### Is Clock Buster free?

Clock Buster is free to download, with no in-app purchases.

### Which has better reviews, Eye Handbook or Clock Buster?

Clock Buster is rated higher. Eye Handbook averages 4.8 out of 5 from 1.2K ratings, while Clock Buster averages 5.0 from 6 ratings.

### Do Eye Handbook or Clock Buster have ads?

Eye Handbook shows ads; Clock Buster does not.

### Which is updated more often, Eye Handbook or Clock Buster?

Eye Handbook ships an update every 3 weeks, and Clock Buster every 9 days. Most recently, Eye Handbook was updated on October 15, 2026 and Clock Buster on October 3, 2026.

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*Compared by [AppsHunter](https://appshunter.io/) from daily US App Store data. Review summaries are generated from verbatim App Store reviews.*